Sinclair SDV 6 Service Manual page 71

8.1.10 A91 - Mode conflict (SDV5 communication protocol adopted)
Available when using SDV5 platform wired controller.
Error display
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
68
Digital display
Faulty IDU: The fan continues running, and the EEV is closed. Other IDUs of the same system:
operate normally.
ODU of the same system: operate normally.
 The ODU is running in heating mode, and the IDU is running in cooling mode or
dehumidification mode.
 The ODU is running in heating mode, and the IDU is running in fan mode (note: the wired
controller can be used to set whether the heating mode conflicts with the fan mode).
The ODU is running in cooling mode, and the IDU is running in heating mode.

Automatic recovery
 The operation mode of IDU conflicts with that of the ODU.
 The IDU main control board is damaged.
After operating mode
(1), is the error
Fault cleared
Note:
1. For all IDUs in the heat pump system (Except for DC Fresh Air Processing Unit): 1) When the
ODU is running in heating mode, the IDU can only operate in heating mode. If you would like to
use the fan mode for the IDU, the wired controller needs to be used to change the settings (for
more instructions on how to change settings, refer to "Instruction for Use of the wired controller").
2) When the ODU is running in cooling mode, the IDU can operate in cooling mode or fan mode.
A91
Reset IDU
No
cleared?
Yes
Display position
Panel, display box, and wired controller
(Note: Error codes are displayed 2 minutes
after faults are triggered)
Replace the main control
board of the IDU